While native device assistants have long left users wanting more, OpenAI's voice models have quietly been getting closer and closer to the assistants we've always been promised. The latest version of ChatGPT Voice just took another big step in that direction.On Wednesday, the company launched GPT-Live, a new generation of voice models that aims to make talking with AI feel even more like having a conversation with a human. At the heart of the upgrade is a new full-duplex architecture, which enab...